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PeachParts Mercedes-Benz Forum (http://www.peachparts.com/shopforum/)
-   Tech Help (http://www.peachparts.com/shopforum/tech-help/)
-   -   Does anyone have a picture of where a high side ac valve is located? (http://www.peachparts.com/shopforum/tech-help/253644-does-anyone-have-picture-where-high-side-ac-valve-located.html)

spree17 06-11-2009 07:31 PM
5 Attachment(s)
Anyone see it or could they point me to the area?

bolomiester 06-11-2009 09:14 PM
Quote:
Originally Posted by spree17 (Post 2222570)
Anyone see it or could they point me to the area?
It looks like the cold air intake that leads to the air cleaner is pushed forward and to the right blocking the AC high side valve. You may have to remove it to get to the valve.

spree17 06-11-2009 09:22 PM
Thank You. I was wondering about that myself. I went and looked at it. It seems to be riveted in place so I dont think it slipped. I looked behind it and to the side of it. I saw a ac line but no valve. :(

Are there any 1993 190e owners that can help a brother out? :)

bolomiester 06-12-2009 01:01 PM
Quote:
Originally Posted by spree17 (Post 2222647)
Thank You. I was wondering about that myself. I went and looked at it. It seems to be riveted in place so I dont think it slipped. I looked behind it and to the side of it. I saw a ac line but no valve. :(

Are there any 1993 190e owners that can help a brother out? :)
There's another possibilty I can think of. If your car originally used R-12 refrigerant, and was converted to use R134a, it could be that it wasn't done right. My first MB, an '83 380 SEL had been converted at some point but the PO had only changed the low side valve, the high side was still for R-12, just a small "valve stem" looking valve with no cap on it. Look closer and see if that's the case on yours. If it is, correcting it is a simple matter of picking up the correct high side valve and screwing it on.

spree17 06-12-2009 03:45 PM
Quote:
Originally Posted by bolomiester (Post 2223088)
There's another possibilty I can think of. If your car originally used R-12 refrigerant, and was converted to use R134a, it could be that it wasn't done right. My first MB, an '83 380 SEL had been converted at some point but the PO had only changed the low side valve, the high side was still for R-12, just a small "valve stem" looking valve with no cap on it. Look closer and see if that's the case on yours. If it is, correcting it is a simple matter of picking up the correct high side valve and screwing it on.
I know that to be the case. I have the high valve fitting. I just cant find where to put it. :)

spree17 06-12-2009 04:27 PM
Good news bad news

Good news is while I was looking for the ac valve I found the coolant drain. Is there more than one? It is much easier than previous cars to drain coolant. Maybe I will drain and refill my coolant one day soon.

Bad news I still cant find that valve stem. I wish somebody that has a 190e could help me. :)

slk230red 06-12-2009 05:08 PM
Quote:
Originally Posted by spree17 (Post 2223247)
Good news bad news

Good news is while I was looking for the ac valve I found the coolant drain. Is there more than one? It is much easier than previous cars to drain coolant. Maybe I will drain and refill my coolant one day soon.

Bad news I still cant find that valve stem. I wish somebody that has a 190e could help me. :)
I can't tell from your profile, but is your 190 a US version?

spree17 06-12-2009 05:10 PM
Quote:
Originally Posted by slk230red (Post 2223281)
I can't tell from your profile, but is your 190 a US version?
I assume it is based on its history of residing in the USA since it was sold. How would I find out for sure?

slk230red 06-12-2009 05:33 PM
2 Attachment(s)
Then I'm sure it is, I just didn't want to assume anything.

Question, are you wanting to convert to R134a, or do you just want to check your high side pressure?

Is your A/C currently working?

Have you owned the car since new?

I just can't understand why the high side valve isn't easy to be located.

Here are 2 photos of my '93 2.3 high pressure side location.

spree17 06-12-2009 06:54 PM
Quote:
Originally Posted by slk230red (Post 2223291)
Then I'm sure it is, I just didn't want to assume anything.

Question, are you wanting to convert to R134a, or do you just want to check your high side pressure?

Is your A/C currently working?

Have you owned the car since new?

I just can't understand why the high side valve isn't easy to be located.

Here are 2 photos of my '93 2.3 high pressure side location.
Wow yours is so easy to see. Thanks for posting those. I previously converted the low side to 134a but not the high side. I want to check the high side pressure among other possible things.

The AC currently works but not very well in 95-102 degree Texas heat.

I'm the second owner. I have had it around 4 years.

Even though mine does not look the same as yours maybe your pictures will help me. :)

spree17 06-13-2009 12:10 AM
I may have been looking in the wrong area. I just read this on another board.
Quote:

the black cap should be on the valve that is underneath the air filter, and that is the high pressure valve,
Quote:
**The smaller pipe is the high side with the black cap, remove air breather system for proper location/identification...

spree17 06-15-2009 05:27 PM
After almost 2 weeks of looking I found it thanks to this perfect advice!!!!!!!

Quote:
Originally Posted by oldschool (Post 404994)
The high pressure valve is located on the top right (as you are looking down) of the ac compressor. The compressor is right underneath the power steering pump. There may be some gunk build up there, and it may be hard to see the black plastic cap on the high side port. I take off the fresh air intake. This will provide access for you eyes and hands. The fresh air intake can be removed at the air filter housing by prying off the flexible rubber hose between the air intake and filter housing. Once removed the compressor will be visible.


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